[PATCH v2 12/21] drm/i915/dp: Use check link state work in the detect handler

[gareth.yu at intel.com]

A bad link in MST is not retrained. Please also consider MST.
The issue ticket is https://gitlab.freedesktop.org/drm/i915/kernel/-/issues/10902.

	if (intel_dp->is_mst) {
		/*
		 * If we are in MST mode then this connector
		 * won't appear connected or have anything
		 * with EDID on it
		 */
		status = connector_status_disconnected;
		goto out;
	}

	/*
	 * Some external monitors do not signal loss of link synchronization
	 * with an IRQ_HPD, so force a link status check.
	 */
	if (!intel_dp_is_edp(intel_dp)) {
		ret = intel_dp_retrain_link(encoder, ctx);
		if (ret)
			return ret;
	}